I'll Have Another's Road to Triple Crown Blocked

The results of the necropsy leads investigators to believe the horse was killed deliberately.

$12M for a Sprawling North California Ranch

"In order for this weapon to be used in this manner, the perpetrator would have had to hold the device up to the horse's forehead while the trigger was depressed," a statement from the Lake County (Indiana) Sheriff's Department said.

Authorities said they now believe whoever killed the mare had experience in the meat processing field.

Anyone with information is asked to contact the department at 800-750-2746.

The Humane Society is offering a $2,500 reward for information that leads to the arrest and conviction of Lady May Z's killer.